Which line in Wang Wei's poem expresses longing for distant relatives?

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When Wang Wei was 17 years old, he went to Xi'an to seek fame. On the Double Ninth Festival of that year, he wrote this famous poem about homesickness that has been passed down through the ages in an inn. The poem conveys the feeling of being alone in a foreign country. The sadness is expressed simply, and at the same time, the homesickness is reflected by the suspense of relatives far away. The language is simple and the emotions are deep, expressing the common feelings that everyone has but cannot express.